Charles l



l (N0 Model.)

G'L CARMAN. RUSHING ROLLS,

-N0. 580,481. Patented Apr. 13, 1897.

llll ,N gna@ Nrrnn rr-tres CHARLES L. CARMAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO TI-IE GATES IRON WORKS, OF SAME PLACE.

CRUSHlNG-ROLL.

SPECIFICATION formingrpart of Letters Patent No. 580,481, dated April 13, 1897. Appiioaion inea November 12,1895. serrano. 568,878. (No man.)

To a/ZZ whom it may concern:

Be it known that I, CHARLES L. GARMAN, a citizen of the United States, residing at Ohicago, Illinois, have invented certain new and useful Improvements in Crushing-Rolls, of which the following is a specification.

My invention relates especially to that class of machines which are commonly known as Cornish rolls for crushing stone, ore, and similar substances, and particularly to the means by which such rolls are held in operative position.

The object of my invention is to provide a simple, economical, and eiiicient mechanism by which the'bearing portions are adjusted to and held in different operative positions.

A further object of my invention is to provide simple and efficient means by which the rolls and their bearing portions may be easily removed from the supporting` frame or base without disturbing the position of any other portion of the mechanism; and the invention consists in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure l is a plan view of a complete machine, looking at it from the top and fitted with my improvements; Fig. 2, a side elevation, partly in section, taken on line 2 of Fig. l; Fig. 3, an end elevation; Fig. e, a perspective view of one of the adjustable brackets and removed from the supporting-base; Fig. 5, a transverse section taken through one of the bearing-boxes on line 5 of Fig. l; and Fig. 6, a perspective View of one of the adjustable brackets, the portion broken away to show the lseat for the bearing-box and with the bearing-box removed.

It is Well known in the art to which this invention relates that the composition metal, usually Babbitt, in the bearing-boxes wear out very fast, and as a consequence the boxes have to be removed for the purpose of rebabbittingthem. In order to do this, it is necessary to remove the rolls at the same time, which usually destroys the position, so that when they are replaced it takes considerable time and expense` to readjust the parts. Again, it is well known that in the act of grinding material the strain on the rolls is unequal and often results in injury to the rolls and bearings, for the reason that no provision is made for relieving the unequal strain. My invention, therefore, is designed principally to obviate these defects by providing simple and efficient means by which the rolls and their bearing boxes may be removed Without disturbing their relation with the other parts when reassembled and by providing means by which the boxes will accommodate the rolls to unequal strains and permit the rolls to run in different alinements.

In constructing crushing-rolls fitted with my improvements I use a base A, of the desired size, form, and strength, to support the various parts and mechanisms. A pair of .rolls B B are provided, secured to or forming a part of the shafts b b. The roll B is what may be termed the main roll, in that it is not adjustable, but has its bearing-boxes b2 b2 mounted in rigid bracket portions b3 of the base. The second or adjustable roll B has its bearing-boxes h4 mounted in adjustable brackets if, and in order to obtain an adjustment of these brackets the lower portions are provided with tongues if, fitting in grooves o7 of the base. A bolt or rod O is passed through the rigid part of the base and through an opening in the brackets, and is provided at one end with a head c and at the Opposite end with screw-threads, upon which are mounted a pair of holding and lock nuts c' c2. The rear end of the bolt is also provided with a Washer C', between which and the rigid portion of the machine is interposed a set of springs c3, which permit the yielding of the bracket, bearing-boxes, and rolls to unusual strains to which the rolls may be submitted. To position the adjustable roll, a number of shims C2 are interposed between the adjustable bracket and the rigid portion of the base. (See Fig. 2.)

To enable the adjustable roll to run smoothly and efliciently, either parallel With the main roll orin angular relation therewith,

"the ends of the bearing-boxes, as at hs, are

turned on a circle With the center on a line With the center of the shaft and are tted in circular recesses b9 of the brackets. The

lower edges b1@ of the boxes are flattened so as to rest on ledges h of the brackets and thus position the rolls in their vertical position.

From the foregoing it Will be seen that if one end of the vroll is subjected to a heavier strain than the other it may accommodate itself to such strain and not injure the roll or bearing portion.

To rigidly hold the boxes in position, a flanged cap D is provided for each bracket and bolted to such brackets by means of the bolts and nuts d. A hopper E is also -provided, by which material may be fed to the rolls as desired.

Fig. 5 shows a section through the lubricating-cup of the boXes,in Which G represents the lubricant and g the cap for closing the opening.

The principaladvantage `amon g the many resulting from the use of my improvements is the facility With Which the rolls may be removed and reinserted Without causing any derangement of parts so as to require readjustment. This is accomplished by merely removing the cap D, When the roll' and yits bearing-boxes may be readily removed-the adjustable bracket remaining` fixed-so that on the reinsertion of the rolls and boxes they Will occupy their former relation to the other roll.

I claiml. In crushing-rolls, the combination of a supporting base portion, a roll mounted in rigid bracket portions, a roll mounted in adj ustable brackets, tWo pairs of boxes secured in such brackets, so that they may be removed and replaced Without disturbing the position of such brackets, a pair of bolts passed through open-ings in the adjustable brackets and rigid portion of the machine and provided With yielding mechanism and securingnuts, and pieces interposed between the adjustable brackets and a stationaryportion of the machine to position the adjustable roll, substantially as described.

2. In crushing-rolls, the combination of a supporting base portion, a roll mounted in rigid bracket portions, a roll mounted in adj ustable brackets, two pairs of bearing-boxes removably secured in the brackets, one pair of whichthose in the adjustable bracketsare pivotally mounted therein, a pair of bolts passed through openings in the adjustable brackets and rigid portion of the machine for adjusting the relation of the parts, aset of springs interposed between the bolt and machine, and pieces or shims interposed between the adjustable brackets and stationary portion oi' the machine, substantially as described.

3. In crushing-rolls, the combination of a frame portion having a pair of rolls mounted thereon, at least one `pairof ad just-able brackets having recesses with circular side Walls and substantially iiat bottoms, bearing-boxes With curved vertical and flat bottom surfaces to tit the bracket-recesses andadapted to -hold at least one of the rolls and so arranged that the boxes may oscillate ina horizontal plane but are held against other movements, and means for holding the kadjustable brackets in operative position, substantially as described.

CHARLES L. CARMAN.

Witnesses:

G. F. J oHNsToN, H. XV. HoYT. 

